JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 18 March 2021, Shift 1, Physics Q10

Question 10 of 90 in this shift, Physics question 10 of 30, Section A.

Imagine that the electron in a hydrogen atom is replaced by a muon (

\mu

). The mass of muon particle is 207 times that of an electron and charge is equal to the charge of an electron. The ionization potential of this hydrogen atom will be :

(1)13.6 eV
(2)27.2 eV
(3)331.2 eV
(4)2815.2 eVOfficial answer

Official answer

Option 4

NTA final key.

Chapter: Atoms
Topic: Bohr's Atomic Model
Idea tested: Reduced Mass Effect

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.